/*
 *  Copyright 2004 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.core.actionPage;

import com.blandware.atleap.common.Constants;
import com.blandware.atleap.model.core.ActionPage;
import com.blandware.atleap.service.core.PageManager;
import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.form.core.ActionPageForm;
import com.blandware.atleap.webapp.util.core.LocaleUtil;
import com.blandware.atleap.webapp.util.core.WebappConstants;
import com.blandware.atleap.webapp.util.core.WebappUtil;
import org.apache.commons.validator.GenericValidator;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;

/**
 * <p>Prepares form bean to update action page's data
 * </p>
 * <p><a href="CallUpdateActionPageAction.java.html"><i>View Source</i></a></p>
 * <p/>
 *
 * @author Sergey Zubtsovskiy <a href="mailto:sergey.zubtsovskiy@blandware.com">&lt;sergey.zubtsovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.24 $ $Date: 2008/04/29 17:48:04 $
 * @struts.action name="actionPageForm"
 * path="/core/actionPage/callUpdate"
 * scope="request"
 * validate="false"
 * roles="core-actionPage-update, core-actionPage-updateContent, core-actionPage-view"
 * @struts.action-forward name="updateActionPage"
 * path=".core.actionPage.update"
 * @struts.action-forward name="listActionPages"
 * path="/core/actionPage/list.do"
 * redirect="true"
 */
public final class CallUpdateActionPageAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request, HttpServletResponse response) throws Exception {

		if ( isCancelled(request) ) {
			return mapping.findForward("listActionPages");
		}

		if ( !request.isUserInRole("core-actionPage-update") && !request.isUserInRole("core-actionPage-updateContent") ) {
			response.sendError(HttpServletResponse.SC_FORBIDDEN);
			return null;
		}

		ActionPageForm actionPageForm = (ActionPageForm) form;
		Long actionPageId = null;
		if ( !GenericValidator.isBlankOrNull(actionPageForm.getId()) ) {
			actionPageId = Long.valueOf(actionPageForm.getId());
		} else if ( request.getSession().getAttribute(WebappConstants.ACTION_PAGE_ID_KEY) != null ) {
			actionPageId = (Long) request.getSession().getAttribute(WebappConstants.ACTION_PAGE_ID_KEY);
		} else {
			if ( log.isWarnEnabled() ) {
				log.warn("Missing action page ID. Returning to list...");
			}
			return mapping.findForward("listActionPages");
		}

		PageManager actionPageManager = (PageManager) getBean(Constants.PAGE_MANAGER_BEAN);
		ActionPage actionPage = actionPageManager.retrieveActionPage(actionPageId);

		if ( actionPage == null ) {
			// action page not found. it might be deleted by someone else
			ActionMessages errors = new ActionMessages();
			errors.add("actionPageNotFound", new ActionMessage("core.actionPage.errors.notFound"));
			saveErrors(request, errors);
			return mapping.findForward("listActionPages");
		}

		WebappUtil.copyProperties(actionPageForm, actionPage, request);
		actionPageForm.setTitleMap(actionPage.getTitle());
		actionPageForm.setDescriptionMap(actionPage.getDescription());
		actionPageForm.setKeywordsMap(actionPage.getKeywords());

		List contentLocales = LocaleUtil.getInstance(servlet.getServletContext()).getEnabledLocales();

		request.getSession().setAttribute(WebappConstants.CONTENT_LOCALES_COLLECTION_KEY, contentLocales);

		// save transaction token in request
		saveToken(request);
		return mapping.findForward("updateActionPage");
	}

}